Question

From one thread I got the following code:

int next_stuff(char **code){     ...            len=read(file_desc,buffer+end_len,packet_size-end_len);     if(len<=0)     {         if(len==-1 && errno==EAGAIN) return(0);         else return(-1);     }     ... }  while (next_stuff(&buff) == 0) {     ... } 

On the other thread I’d like to finish that socket and exit this operation, but only doing a

close(file_desc); 

does not cause read to return nonblocked. Am I missing something?

EDIT:

shutdown does not work as well. And I am trying that on Linux 2.6.23

Answer 1

shutdown(fd, SHUT_RD);

$ man -s 2 shutdown

NAME shutdown — shut down part of a full-duplex connection

SYNOPSIS

 #include <sys/socket.h>   int     shutdown(int socket, int how); 

DESCRIPTION

 The shutdown() call causes all or part of a full-duplex connection on the socket   associated with socket to be shut down.    If how is SHUT_RD, further receives will be disallowed.  If how is   SHUT_WR, further sends will be  disallowed.  If how is SHUT_RDWR, further sends and receives will be disallowed. 

RETURN VALUES

 The shutdown() function returns the value 0 if successful; otherwise the value -1 is   returned and the global variable errno is set to indicate the error.